Dynamic bass boost apparatus and method

H - Electricity – 03 – G

Patent

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H03G 5/00 (2006.01) H03G 9/00 (2006.01)

Patent

CA 2538809

Audio processing methods and apparatus are provided for at least partially compensating for the Fletcher-Munson effect. An audio processor includes a variable filter receiving an input signal and providing a filtered output signal, the variable filter having a fixed cutoff frequency and a quality factor that is controllable in response to a control signal, and a control circuit configured to detect a signal level representative of input signal level in a selected band and to generate the control signal in response to the detected signal level. The control circuit may include a low-pass band select filter and a detector for detecting a signal level in the band selected by the low-pass filter and for generating the control signal.

L'invention concerne des procédés et un appareil de traitement audio permettant de compenser partiellement l'effet de Fletcher-Munson. Un processeur audio comporte un filtre variable qui reçoit un signal d'entrée, engendre un signal de sortie filtré et possède une fréquence de coupure établie et un facteur de qualité pouvant être commandé en réponse au signal de commande, et un circuit de commande conçu pour détecter un niveau de signal représentatif du niveau de signal d'entrée dans une bande sélectionnée et pour engendrer le signal de commande en réponse au niveau de signal détecté. Ledit circuit de commande peut aussi comprendre un filtre de sélection de bande passe-bas et un détecteur servant à détecter un niveau de signal dans la bande sélectionnée par ledit filtre passe-bas et à engendrer le signal de commande.

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